/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Iterator;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.fileupload.*;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.apache.commons.fileupload.servlet.ServletRequestContext;

/**
 *
 * @author HP DV5
 */
public class Upload extends HttpServlet {

    /** 
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        boolean isMultiPart = FileUpload.isMultipartContent(new ServletRequestContext(request));
        if (isMultiPart) {
            FileItemFactory factory = new DiskFileItemFactory();
            ServletFileUpload upload = new ServletFileUpload(factory);
            try {
                List items = upload.parseRequest(request);
                Iterator iter = items.iterator();
                while (iter.hasNext()) {
                    FileItem item = (FileItem) iter.next();
                   
                    if (!item.isFormField()) {
                        if (item.getName().length() > 0) {
                            System.out.println(item.getSize());
                            if(item.getSize() < 1)
                                this.inserirImagemDiretorio(item);
                            else
                                System.out.println("Nao foi possival efetuar o download !");
                        }
                    }
                }
            } catch (FileUploadException ex) {
                ex.printStackTrace();
            } catch (Exception ex) {
                ex.printStackTrace();
            }
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>

    private void inserirImagemDiretorio(FileItem item) throws FileNotFoundException, IOException {
        String caminho = "C:/Users/HP DV5/Desktop/teste";

        File diretorio = new File(caminho);
        //System.out.println("diretorio: " + diretorio.getAbsolutePath());
        if (!diretorio.exists()) {
            diretorio.mkdir();
        }

        String nome = item.getName();
        String arg[] = nome.split("\\\\");
        for (int i = 0; i < arg.length; i++) {
            nome = arg[i];
        }

        File file = new File(diretorio, nome);
        FileOutputStream output = new FileOutputStream(file);
        InputStream is = item.getInputStream();
        byte[] buffer = new byte[2048];
        int nLidos;
        while ((nLidos = is.read(buffer)) >= 0) {
            output.write(buffer, 0, nLidos);
        }
        output.flush();
        output.close();
    }
}

